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  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->
<html>
<header><title>Comet Simple Chat Application</title>

<script type="text/javascript" src="../../dojo/dojo.js.uncompressed.js"></script>
<script type="text/javascript" src="../../dojox/cometd.js"></script>
<script type="text/javascript" src="../../dojox/cometd/_base.js"></script>

<script type="text/javascript">

dojo.require("dojox.cometd");

dojo.addOnLoad(function() {
  dojo.byId("message").style.visibility='hidden';
  dojox.cometd.init("/cometd/cometd");
});


function trim(str) {
    return str.replace(/(^\s+|\s+$)/g,'');
}


function clear() {
  dojo.byId("msgtext").value = "";
  dojo.byId("msgtext").focus();
}


function enterKeyHandler(e) {
if (!e) e = window.event;
   if (e.keyCode == 13) {
      send(trim(dojo.byId("msgtext").value));
      clear();
   }

}


function connect() {
  dojox.cometd.subscribe("/chat/demo", onMsgEvent);
  dojo.byId("login").style.visibility='hidden';
  dojo.byId("message").style.visibility='visible';
  send("Has joined the chat room");
  clear();
  dojo.byId("msgtext").onkeydown = enterKeyHandler;
  dojo.byId("myname").appendChild(document.createTextNode("-> " + dojo.byId("scrname").value + " <-"));
}


function onMsgEvent(event) {

   // Break apart the text string into screen name and message parts.
   var str = trim(event.data.msg);
   var scrname = ""; 
   if (str.match(/^.*[|].*$/)) {
       var spl = str.split("|");
       scrname = spl[0];
       str = " - " + spl[1];
   }

   // Insert the screen name in red and the message black into the DOM
   var newP = document.createElement("p");
   var fnt1 = document.createElement("font");
   var attr1 = document.createAttribute("color");
   attr1.nodeValue = "red";
   fnt1.setAttributeNode(attr1);

   var newT = document.createTextNode(scrname);
   fnt1.appendChild(newT);

   newP.appendChild(fnt1);  

   var fnt2 = document.createElement("font");
   var attr2 = document.createAttribute("color");
   attr2.nodeValue = "black";
   fnt2.setAttributeNode(attr2);

   var newT2 = document.createTextNode(str);
   fnt2.appendChild(newT2);

   newP.appendChild(fnt2);  

   dojo.byId("dialog").appendChild(newP)
}


function send(msg) {
  var scrname = dojo.byId("scrname").value;
  var evt = {'data': { 'msg': trim(scrname) + '|' + msg }};
  onMsgEvent(evt);  // Echo local
  dojox.cometd.publish("/chat/demo", evt.data);
}


</script>

</head>
</header>
<body>
<form>
<div id="login">
Screen name:&nbsp;<input type="text" id="scrname">
<input type=Button Id=logbtn value=Connect onClick=connect()><br/>Type a screen name and click the 'Connect' button
</div>

<div id="dialog"></div>
<hr/>
<div id="message">
<div id="myname"></div> Is my screen name<br/>
<textarea rows="3" cols="50" id="msgtext"></textarea>[ENTER] sends message</div>
</form>
</body>
</html>

